C4 vantilators wor all the time
Thread Starter
6th Gear
Joined: Nov 2020
Posts: 6
Likes: 1
C4 vantilators wor all the time
Hi
In my vette c4 1990 ventilators work all the time. Just after engine starts, they start as well.
Second thing is that when is cold outside, it engine starts quite hard.
I think those two things are connected with each other.
If anyone has some suggestions, I will be appreciated for them.
Best regards
In my vette c4 1990 ventilators work all the time. Just after engine starts, they start as well.
Second thing is that when is cold outside, it engine starts quite hard.
I think those two things are connected with each other.
If anyone has some suggestions, I will be appreciated for them.
Best regards
Le Mans Master
Joined: Jul 2004
Posts: 6,228
Likes: 698
From: Clifton Park, NY ............Clearwater, FL ... 85 Original Owner
Hi
In my vette c4 1990 ventilators work all the time. Just after engine starts, they start as well.
Second thing is that when is cold outside, it engine starts quite hard.
I think those two things are connected with each other.
If anyone has some suggestions, I will be appreciated for them.
Best regards
In my vette c4 1990 ventilators work all the time. Just after engine starts, they start as well.
Second thing is that when is cold outside, it engine starts quite hard.
I think those two things are connected with each other.
If anyone has some suggestions, I will be appreciated for them.
Best regards
Burning Brakes
Joined: Mar 2010
Posts: 1,094
Likes: 68
From: Providence RI
Does the check engine light come on as you’re starting the car? Is there a chance the bulb is burned out?
the later tpis are known for injectors failing. Can you ohm them out to see if the coils are good?
have you checked basics like fuel pressure?
1990s had two fans right next to each other.
the later tpis are known for injectors failing. Can you ohm them out to see if the coils are good?
have you checked basics like fuel pressure?
1990s had two fans right next to each other.
Drifting
Joined: Dec 2000
Posts: 1,785
Likes: 91
From: Leander TX
Check your coolant temp sensors, should be two of them (at least their is on my 85). One is for the gauge and one is for the ECU. If the fans are on all the time AND it is hard to start only when cold it sounds like the sensor that talks to the ECU may be bad and is telling the car it is hotter than it actually is thus bypassing the cold start routine.
Oil Producer
Joined: Apr 2014
Posts: 9,378
Likes: 2,739
if you are talking about your HVAC (blower motor that blows heat or ac through vents) then your blower motor resistor is most likely culprit. When they fail, they fail on full blast. This is so in case of emergency you are not starving for defog front windshield. It is located on top of blower box, under hood, passenger side, beside the #8 cyl.
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